8.0 PRSR 03-09-2017 - Laserfiche WebLink

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1 In non-freezing temperatures,a glyphosate herbicide such as Roundup can be used for most woody species. It is important to obtain the concentrated formula and dilute it with water to achieve 10% glyphosate concentration.Adding a marker dye helps to make treated stumps more visible, improving accuracy and overall efficiency. In winter months,an herbicide with the active ingredient triclopyr must be used. Garlon 4 is a common brand name and it must be mixed with a penetrating oil,such as diluent blue. Garlon 4 will also work throughout the year. Do not use diesel fuel, as it is much more toxic in the environment and to humans. Brush removal work can be done at any time of year except during spring sap flow, but late fall is often ideal because buckthorn retains its leaves longer than other species and is more readily identified. Moreover, once native plants have senesced, herbicide will have fewer non-target effects on native vegetation. Cutting can be accomplished with loppers or handsaws in many cases. Larger shrubs may require brush cutters and chainsaws, used only by properly trained professionals. For plants in the pea family,such as black locust, an herbicide with the active ingredient clopyralid can be more effective than glyphosate. Common brand names for clopyralid herbicides are Transline, Stinger, and Reclaim. In the year following initial cutting and stump treatment,there will be a flush of new seedlings as well as possible resprouting from some of the cut plants. Herbicide can be applied to the foliage of these plants. Fall is the best time to do this,when desirable native plants are dormant and when the plant is pulling resources from the leaves down into the roots. Glyphosate,triclopyr and Krenite (active ingredient -fosamine ammonium) are the most commonly used herbicides for foliar application. Krenite prevents bud formation so the plants do not grow in the spring. This herbicide can be effective,but results are highly variable. Glyphosate or a triclopyr herbicide such as Garlon can also be used. Glyphosate is non-specific and will kill anything green,while triclopyr targets broadleaf plants and does not harm graminoids.All herbicides should be applied by licensed applicators and should not be applied on windy days. Care should be taken to avoid application to other plants. "Weed Wands" or other devices that allow dabbing of the product can be used rather than spraying, especially for stump treatment. Basal bark herbicide treatment is another effective control method.A triclopyr herbicide such as Garlon 4, mixed with a penetrating oil, is applied all around the lower 6-12 inches of the tree or shrub,taking care so that it does not run off. If the herbicide runs off it can kill other plants nearby. More herbicide is needed for effective treatment of plants that are four inches or more in diameter. Undesirable trees and shrubs can also be destroyed without cutting them down. Girdling is a method suitable for small numbers of large trees. Bark is removed in a band around the tree,just to the outside of the wood. If girdled too deeply,the tree will respond by resprouting from the roots. Girdled trees die slowly over the course Friends of the Mississippi River Bailey Point Nature Preserve NRMP 76